Earth/Physical science QHS final pt1

Chapters 5,6,11,12. Took the most important questions

 What does a porphyritic texture mean in terms of cooling history?

The magma cooled slowly at first, and then the cooling sped up.

Igneous rocks are identified by their composition and texture characteristics. What does texture refer to?

crystal size

 What does a porphyritic texture mean in terms of cooling history?

The magma cooled slowly at first, and then the cooling sped up.

Igneous rocks are identified by their composition and texture characteristics. What does texture refer to?

crystal size

What process explains why a molten magma often is a mix of molten rock and crystals?

partial melting

 Which rock shown in the figure cooled the fastest?

A) fine-grained B) porphorytic  C) glassy D) coarse-grained

glassy

Which explains the relationship between cooling magma and mineral formation?

Bowen's reaction

What has a mafic composition and a coarse-grained texture? A) diorite B) basalt C) gabbro D) obsidian

gabbro

 Igneous rocks form from _.

crystallization of magma

Which observation about a rock could lead you to identify it as igneous?

glassy texture

What is the source of heat inside Earth that melts rocks into magma?

the decay of radioactive elements

What process explains why a molten magma often is a mix of molten rock and crystals?

partial melting

 During fractional crystallization mineral crystals

form and become separated from the magma

igneous rock forms…

when magma is trapped deep inside the Earth.

Which type of metamorphism occurs at high temperatures and medium to low pressures?

contact

What type of weathering occurs when minerals get dissolved?

chemical

 How are clastic rocks classified?

particle size

What are the two types of weathering?

physical and chemical

 What do different grades of metamorphic rocks reflect?

relative amount pressure and temperature

  What is the most likely way for the rock layer at the bottom of the sequence shown below to be exposed to sunlight?

weathering and erosion

  What processes aid in the formation of sediments

weathering and erosion

Wind and water can push sediment into distinct layers and shapes. What is formed by moving river water?

asymmetrical ripple marks

 Which of the following is an example of an evaporite? A) breccia B) coal C) rock salt D) shale

rock salt

Why is porosity in sandstone important?

Water and oil can travel through it with ease.

Metamorphic rocks with aligned minerals have a ____ texture

foliated

Most sedimentary rocks are formed by _.

compaction and cementation

 Rocks are classified as igneous, sedimentary, or metamorphic based primarily on their ____.

process of formation

__ is the transfer of energy through space by electromagnetic waves.  

Conduction

__________ is the transfer of energy that fuels atmospheric processes, while __________ is used to measure and interpret that energy.

Heat, temperature

Atmospheric pressure with altitude

decreases, increasing

Clouds are classified by __.

the altitude of the cloud formation and its shape

Dust and sea salt are examples of __ that aid in the formation of cloud droplets.

condensation nuclei

 How are clouds formed?

Warm moist air is forced to rise over a mountain. B) Warm air is forced into a convection current. C) Two air masses of different temperatures meet. D) All of these answers are correct.*

In what layer are light gases, such as helium and hydrogen, found?

exosphere

10.  The ratio of water vapor in a volume of air, relative to how much water vapor that volume of air is capable of holding, is called __.

relative humidity

Which occurs during a temperature inversion?

A layer of warmer air is laid on top of a cool layer of air.

What percent of incoming radiation from the Sun is absorbed by Earth's surface?

50

What type of gas found in Earth's atmosphere absorbs UV radiation from the Sun?

ozone

Why is the amount of carbon dioxide in the atmosphere important?

It helps regulate the amount of energy the atmosphere absorbs.

Why does the temperature of air decrease as elevation increases in the troposphere?

Air is cooler when it is farther from the heat source.

The burning of fossil fuels has the greatest and most direct impact on the cycle.

carbon

  __ is used to measure the speed of raindrops toward or away from a specific point.

Doppler radar

 A __ is a narrow region that separates two air masses of different densities.

front

A forecast that involves comparing current weather patterns to past weather patterns is called __.

 an analog forecast

 A forecast that relies on numerical data is called __

digital forecast

 High-pressure systems usually are associated with and low-pressure systems are associated with .

 fair weather, clouds and precipitation

  At _, warm air displaces cold air and it develops a gradual frontal slope

a warm front

 Long-term variations in weather for a particular area make up the __ of an area.

climate

The exchange of heat or moisture between an air mass and the underlying surface is called __.

air mass modification

What are four- to seven-day forecasts based on?

 circulation patterns of the troposphere

What causes the Coriolis effect?

Earths rotation

 What is a large body of air that takes on the characteristics of the area over which it forms?

an air mass

What is the network of weather stations located across the United States called?

ASOS

What type of instrument is used to measure wind speed?

an anemometer

Thunderstorms develop from cummulus clouds that grow into huge ___ clouds.

cumulonimbus

Thunderstorms form when three conditions exist that cause cumulus clouds to grow by the energy method of

convection

First, there must be sufficient (3)____

in the lower atmosphere to condense and release latent

heat. Second, some mechanism must make the air rise, causing the cloud to grow.

moisture

Third, the portion of the atmosphere that the cloud grows through must be (4)____

unstable

The rising cloud must stay (5) ___

than the air around it in order for the growth to continue.

warmer

The cloud’s growth stops when the rate of (6)

___in the cloud, which diminishes with height, is insufficient to create enough heat to keep the cloud warmer than the air around it.

condensation

Growth will also stop if the rising air meets a layer of

(7)___air that it cannot overcome.

stable

Forms when an air mass rises as a result of

orographic lifting

Mountain thunderstroms

Forms because of temperature differences between

the air over land and the air over water

Seabreeze thunderstorms

. Forms as cold air pushes warm air up at a boundary

between cold and warm air masses

Frontal thunderstroms

the stages in the development of a thunderstorm in the order in which they occur. step 1

Warm, moist air rises quickly, and the moisture condenses into a visible cloud. Then updrafts form.

Equal amounts of updrafts and downdrafts form convection cells.

Step 4

Step 3

Falling precipitation cools the air around it, forming downdrafts.

Precipitation begins to fall.

Step 2

Step 6

The updrafts cease and precipitation stops.

The updrafts slow as downdrafts decrease the supply of warm, moist surface air.

Step 5

Large pools of extremely cold air develop strong high-pressure systems over polar continental areas. Jet streams move systems.

cold waves

Large, warm, high-pressure system develops, remains over an area, and blocks cooler air masses from entering the area.

heat waves

Sinking air from a strong high-pressure system stops air from rising and condensation from occurring over a long period of time.

drought

A thunderstorm unleashes heavy precipitation.

flood

Extended period of below-normal temperatures

cold wave

Extended period of above-normal temperatures

heat wave

Extended period of well-below-normal rainfall

drought

Thunderstorm remains over an area for many hours

flood

What is a tornado?

A column of warm, humid air begins to rise very quickly.